From 736273c7fe3e88baf548cd555f21eb123f81381d Mon Sep 17 00:00:00 2001
From: David Blaikie <dblaikie@gmail.com>
Date: Fri, 8 Nov 2019 15:26:17 -0800
Subject: DebugInfo: Do not create a debug_macinfo section if no CUs have
 associated macros

Patch based on Sourabh Singh's D69839 patch.
---
 llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp')

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index d17dd4dc3f7..56615584a18 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -2737,10 +2737,6 @@ void DwarfDebug::emitDebugMacinfo() {
       }))
     return;
 
-  // Start the dwarf macinfo section.
-  Asm->OutStreamer->SwitchSection(
-      Asm->getObjFileLowering().getDwarfMacinfoSection());
-
   for (const auto &P : CUMap) {
     auto &TheCU = *P.second;
     if (TheCU.getCUNode()->isDebugDirectivesOnly())
@@ -2750,6 +2746,8 @@ void DwarfDebug::emitDebugMacinfo() {
     auto *CUNode = cast<DICompileUnit>(P.first);
     DIMacroNodeArray Macros = CUNode->getMacros();
     if (!Macros.empty()) {
+      Asm->OutStreamer->SwitchSection(
+          Asm->getObjFileLowering().getDwarfMacinfoSection());
       Asm->OutStreamer->EmitLabel(U.getMacroLabelBegin());
       handleMacroNodes(Macros, U);
       Asm->OutStreamer->AddComment("End Of Macro List Mark");
-- 
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